HARLEY Knucklehead Rocker Box Seal Kit for 1 Head Fits 1936-1940 EL, rear only

Knucklehead rocker box cover kit is for conversion and will fit 1938-47 late model valve spring cover set on 1936-38 models. Kit is for use on Knucklehead exhaust rocker shaft. Five piece kit includes one seal steel extension tube and washers for 1 head. Washer has a 1.425 inch and 1.495 inch O.D. the seal has a 1.32 inch and 1.486 inch O.D. and the steel collar measures .87 inch in length. Rocker box seal kit has enough parts for one rear application. *NOTE: See photo for rocker arm clearance required for installaiton for rear exhaust rocker. FITS HARLEY: 1936-1940 EL, rear only